78332071 has 12 divisors (see below), whose sum is σ = 83165736. Its totient is φ = 73722960.

The previous prime is 78332063. The next prime is 78332083. The reversal of 78332071 is 17023387.

It is not a de Polignac number, because 78332071 - 2³ = 78332063 is a prime.

It is a super-2 number, since 2×78332071² = 12271826694298082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78332021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34456 + ... + 36658.

It is an arithmetic number, because the mean of its divisors is an integer number (6930478).

Almost surely, 2^78332071 is an apocalyptic number.

78332071 is a deficient number, since it is larger than the sum of its proper divisors (4833665).

78332071 is a wasteful number, since it uses less digits than its factorization.

78332071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 78332071 is about 8850.5407179449. The cubic root of 78332071 is about 427.8713456587.

The spelling of 78332071 in words is "seventy-eight million, three hundred thirty-two thousand, seventy-one".